Installation Guide Manual

3.8.2 Power connection with common input utility
BYPASS
RECTIFIER
1 -
&
INPUT
SGT5000_050-080_UPS connection common_02US
OFF
ON
ON
OFF
X1
LOAD
L1-1
L2-1
L3-1
PE
N
L1
L2
L3
N
PE
Fig. 3.8.2-1 Power connections Common Input Utility
SG Series 50 & 80 kVA Max. rating X1 terminals: 4/0 AWG (95mm
2
)
Common Input Rectifier / Bypass
L1-1
Rectifier + Bypass Phase A
L2-1
Rectifier + Bypass Phase B
L3-1
Rectifier + Bypass Phase C
N PE
Neutral Ground
Output Load
L1
Load Phase A
L2
Load Phase B
L3
Load Phase C
N PE
Load Neutral Load Ground
The interconnection links BR1, BR2 and BR3 MUST REMAIN CONNECTED
.
Cable terminations are to the Rectifier Input Terminals and Output Terminals as shown above.
Connect wire to the Terminals using appropriate tools and appropriate torque.
Torque specification for Input / Output and DC power connections on Terminals: see Section 3.8.1.
NOTE !
This UPS is only designed to operate in a wye-configured electrical system with a
solidly grounded neutral.
If the UPS is equipped with an input transformer, the secondary of the transformer
must be wye-configured with neutral solidly grounded.
Modifications reserved Page 24/38
OPM_SGS_ISG_50K_80K_0US_V040.doc Installation Guide SG Series 50 & 80 kVA